Linotype-machine.



Patented Aug. 26, I902. 0. MERGENTHALER & W. T..HOUFNAGLE.

SAFE DEPOSIT AND TRUST COMPANY OF BALTIMORE & A. GREENLEAF, Execufurs of 0. MERGENTHALER, Decd.

LINOTY-PE MACHINE.

(Application filed Dec. 18,1899.)

2 Shoots-Sheet I.

(No llodel.)

N0. 707,645. -Patented Aug. 26, I902.

0. MEBGENTHALEB & W. T. HOOFNAGLE.

SAFE DEPOSIT AND TRUST COMPANY OF BALTIMORE & A. GREENLEAF, Exacutors of 0. MERGENTHALER, Dacd.

LINOTYPE MACHINE.

(Application filed. Dec. 18, 1899.)

2 Sheets-Shoat 2.

(No Model.)

lTED STATES PATENT OFFI E.

SAFE DEPOSIT AND TRUST COMPANY OF BALTIMORE AND ABNER GREEN- LEAF, EXECUTORS OF OTTMAR MERGENTI-IALER, DECEASED, AND WIL- LIAM T. I-IOOFNAGLE, OF BALTIMORE, MARYLAND; SAID HOOFNAGLE ASSIGNOR TO THE OTT. MERGENTHALER COMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF DELAWARE.

LINOTYPE-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 707,645, dated August 26, 1902. Application filed December 18,1899. $erial No. 740,732. (No model.)

To aZZ whom it may concern:

Be it known that OTTMAR MERGENTHALER and WILLIAM T. HOOFNAGLE, citizens of the the United States, residing in the city of Baltimore and State of Maryland, did invent certain new and useful Improvements in Linotype-Machines, of which the following is a specification.

In linotype'machines the slug after being ejected from the mold passes between two trimming-knives, which dress its side faces and reduce the slug to the desired thickness. One of the knives is usually fixed, while the other is capable of adjustment to render their cutting edges parallel and regulate the opening between them, which opening determines the thickness of the slug.

The present invention relates particularly to the means for holding and adjusting the movable knife.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a front view of the knives and adjusting means. Fig. 2 is aside view. Fig. 3 is a section on the line 3 of Fig. 1. Fig. 4 is a section on the line 4 of Fig. 1. Fig 5 is an inside view of the knife-block, the slugguide being removed; and Fig. 6 is a section on the line 6 of Fig. 5.

Referring to the drawings, 10 indicates the fixed knife, 11 the adjustable knife, and 12 the knife-block upon which the adjustable knife is mounted. The knife-block is adapted to be bolted to the main frame of the machine and maybe considered a portion of said.

frame. The knife 10 is to be rigidly connected to the machine in any suitable manner.

The adjustable knife 11 rests upon the flat face of the knife-block and is held firmly to its seat on said block by spring-pressure. As shown, this is accomplished with two spiral springs 13, which are situated in relatively large openings 14 in the knife-block. The upper ends of the springs'pass through smaller openings 15 in the adjustableknife and interlock with a pin 16, extending along the top of the knife. The lower ends of the springs interlock with a similar pin 17, extending along the bottom of the knife-block. The springs are constantly under tension and hold the knife firmly seated upon the knifeblock without, however, interfering with its adjustability laterally upon its seat. The large openings 14 permit the springs to swing about the pins 17, and thus the knife may be adjusted without affecting its-engagement with the springs. Means are provided for adjusting the movable knife into parallelism with the fixed knife and for givingit a quick movement toward and away from the fixed knife. The adjustment into parallelism is effected by means of a pair of screws 18, which abut against the rear side of the knife 11. The knife is held against these screws 18 by spring-pressure imparted, as shown, by flat springs 19, arranged near the ends of the knife. The springs are rigidly connected at one end with the knife-block, and their opposite ends engage a groove 20 in the under side of the knife, in which groove the usual slug-guide 21 is also engaged. The set-screws 18 are axially arranged in adjusting-screws 22, which turn in threaded openings in the knife-block. Upon the adjusting-screws are pinions 23, which mesh with a gear-.24, mounted on a central stud 25 beingdrawn out of engagement with gear 24.

by the adjusting-screws. The pitch of the adjusting-screws and the relative sizes of the gears are such that the knives may be adjusted for all ordinarythicknesses of slugs within the range of a single revolution of the gear 24, whichis preferably limited to a single revolution by the stops 3O 31. Means are provided for locking the gear 24 at fixed points corresponding to the adjustment of the knives for different styles of type. As shown, this is accomplished by means of a pin 26, carried by a spring'27, said pin being adapted to enter holes 28, arranged in the gear 24. The positions of the holes correspond to the different type-faces, and they I may be marked to indicate them, as shown in Fig. 2.

It will be evident that various changes in details of construction may be made without departing from the spirit and scope of the present invention. For instance, the gears 23 may be made thick and the gear 24 thin, or the gear 24 may be mounted on a threaded stud and arranged to travel with the gears 23, in which case all of the gears might be of the same thickness. Means for engaging the ends of; the springs 13 may obviously be varied, and the details of the locking device for the gear 24 may be changed. The claims are therefore not limited to the precise construction and arrangement of parts illustrated and described.

In operating linotype-machines it is desirable to be able to adjust the slug-trimming knives instantly and with extreme accuracy. It will be noted that the devices herein described are especially fitted to fulfil these requirements. N 0 bolts or screws are required to be loosened or tightened in order that the knife may be adjusted. The knife is held to its seat with sufiicient force to prevent any chattering or accidental displacement, but

not so firmly as to Oder much resistance to the adjusting devices. The adjustment is effected instantly by withdrawing the stop from the gear 24, rotating said gear until the desired adjustment is indicated opposite the stop, and then rengaging the stop with the gear.

What is claimed is- 1. In a linotype-machine,the combination of a knife-block having a seat for the trimming-knife, a slug-trimming knife movably seated on said block, a spring arranged to hold said knife firmly to its seat, and means for adjusting the knife laterally upon its seat.

2. In a linotype-machine, the combination of a knife-block, a laterally-adjustable slugtrim min g knife movably seated on said block, means for adjusting the knife laterally on the block, and a spring arranged to hold the knife to its seat, said spring being connected to, and movable with, the knife.

3. In a linotype-niachine, the combination of a knife block having openings therethrough, a slugtrimming knife movably seated on said block and spanning said openings, springs extending through the openings in the knife-block and connected to the knife, and means for adjusting the knife laterally, said springs having freedom'for'lateral movement in the openings of the knife-block wherearranged to impart to said knife a parallel movement, and set-screws carried by the adjusting-screws for alining the knife.

6. In a linotype-machine, the combination of a knife-block,a slug-trimming knife movably seated on said block, a spring to hold said knife to its seat, a pair of adjustingscrews operating on the. back of said knife, a spring to hold the knife against the adjusting-screws, pinions on said screws, a gear connecting said pinions, and a device for locking said gear in predetermined positions, for the purpose set forth.

7. In a linotype-machine, the combination with the knifeblock, and the adjustable knife, of adjusting-screws for imparting to said knife a parallel movement, and the setscrews carried by and arranged axially in said adjusting-screws, for the purpose set forth.

8. In a linotype-machine, the combination of a knife-block, a slug-trimming knife movably seated on said block, adjusting-screws connected to move sim ultaneously, set-screws carried by said adjusting-screws andbearing on the back of the knife, springs arranged to constantly press the knife against said setscrews, and springs arranged to constantly hold the knife to its seat upon the block.

In testimony whereof we affix our signatures at Baltimore, Maryland, this 15th day of December, 1899, in presence of two witnesses.

SAFE DEPOSIT AND TRUST COMPANY OF BALTIMORE, By B. F. NEWCOMER, Pres,

ABNER GREENLEAF,

Emecutors of Ottmar Mergenthaler, deceased.

WILLIAM T. HOOFNAGLE.

Witnesses:

J NO. -W. MARSHALL, GEO. E. TAYLOR. 

